multiply the radius by two then pultiply that by pi
8
The circumference of a circle is twice the radius times PI [2*pi*r] with r = 4 >> about 25
125.6 feet
circumference = 2*pi*5
Work it out the circumfrance of a circle is pie x the diameter!
If the circumference (not circumfrance) is 31.4, the radius is 4.9975 units (to 4 dp).
8
circumference of a circle = pi*diameter or 2*pi*radius
The circumference of a circle is twice the radius times PI [2*pi*r] with r = 4 >> about 25
the circumference of a circle is the length around the outer edge. and you find it by using the formula 2 times pi times the radius of the circle
125.6 feet
circumference = 2*pi*5
Work it out the circumfrance of a circle is pie x the diameter!
30 x 3.14 = 94.2
To find the circumfrance of a circle, you need to multiply 2 times pi, times the circle's radius. If you don't know what that is, you multiply two times pi, and pi equals 3.14, and then multiply that by the radius, which is the measurement of half the circl'e diameter. the diameter is the distance from one side of the circle, to the exact opposite. you measure this with a ruler. HALF the measurement of the diameter is the radius. Example---the diameter of a circle is 20 cm. half the diameter is 10 cm, which is the radius. Multiply 2 times pi[which equals 3.14], times the radius. Good luck!
To find the radius of a circle when given the circumference, you should start with the formula for circumference, which is this: circumference = 2*pi*radius To solve for the radius, you would the have to divide the circumference by 2*pi leaving you with a formula like this: radius = circumference/(2*pi) pi≈3.14159
Formula to find the circumfrance of a circle~(2)(3.14)r or (3.14)d